Carpenter&#39;s square.



W. A. PAWSON.

CARPENTER'S SQUARE.

APPLICATION FILED JUNE 26. l9l6.

Patented. Feb. 19, 1918.

2 SHEETSSHEET 1- INVENTOR. W/LL, LQW/ H P/QWEU/V W. A. PAWSON.

CARPENTER'S SQUARE.

APPLICATION FILED JUNE 26. 1916.

Patented Feb. 1931918.

2 SHEETS-SHEET 2.

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sllll INVENTOR. William K]. Pawsun.

WILLIAM A. PA'WSON, OF SAN FRANCISCO, CALIFORNIA.

CARPENTERS SQUARE.

Specification of Letters Patent.

Patent-ed Feb. 19, 1918.

Application filed June 26, 1916. Serial No. 105,854.

To all whom viz/11mg, concern:

Be it known that I, lVlLLiAM A. Pnwso'x, a citizen of the United States,residin at San Francisco, in the county or San lirancisco, State ofCalifornia, have invented a new and useful tarpentefs Square, of whichthe following is a specification in such full and clear terms as willenable those skilled in the art to construct and use the same.

T his invention relates to a carpentefis square having gages and a bevelsquare in conjunction therewith. especially applicable to use inconjunction with the hanging of doors on mortise butt hinges, although,of course, it will be apparent that the gage has many other uses andthat the square and bevel square may be used for any of the uses towhich such squares are put.

An embodiment of the invention is shown in the drawing in which the samereference numeral is applied to the same portion throughout, but I amaware that there may be many modifications thereof,

Figure 1 is a view of one side of the square,

Fig. 2 is a view of the opposite side of the square from that shown inFig. 1,

Fig. 3 is a view in edge elevation of the square,

Fig. 1 is a sectional view adjacent the pivot pin for the bevel square,

Fig. 5 is a plan view of the square when in use for scribing the hingemortise on the upper edge of a door, it being understood by thoseskilled in the art that ordinarily a door is laid upon its edge by thecarpenter when the mortise is being produced,

Fig. 6 is a plan view of a portion of a door jamb indicated at J showingthe back line of the mortise and door jamb being scribed, and

Fig. 7 is a plan view of a portion of a door jamb showing the outer edgeof the door jam-b being marked for the depth of the mortise therein.

The square comprises a flat piece of steel 1 having a slot at 2 and anopening at 3, which opening has a plurality of difi'erent curves 1:, 5,6, 7 and 8 for the convenience of the carpenter, said curves being ofany desired shape such as circles, cycloids or ellipses as may beconvenient. On the sides of the plate there are the members 9 and 10which members have flanges as indicated at 11 and 12. The members 9 and10 are riv-- eted to the plate 1 and between them there is a recess inthe plate to receive the blade 13 of the bevel square, said bevel squarebeing held in a fixed position by means of the pivot pin 14 which hasthe two thumb nuts 15 and 16 thereon, the objectbeing to prq vide. meanswhereby the blade 13 may be conveniently adjusted from whicheverposition the square may be held in when setting the blade 13. Adjacentone end of the plate lOthere is a block 17 which with the end of theplate 10 forms a guide way for the gage 18, said gage having a point 19and a point 20 for a purpose to be later explained. The gagelS isadjusted by means of the flat head screw 21, the slot 22 being of suchlength as is required to accommodate the necessary adjustment of thegage 18. The gage is turned over when not in use so that its point 19lies adjacent the cut off corner 28 of the plate 10 and the point '20lies in the slot 22. The relation of the point if) to the outer edge ofthe square and ot' the point 20 to the flange 11' is such that when themark has been made on the door amb with the point 19 that the point 20when moved along the door with the flange 11 in contact therewith willleave a mark which will shift the door one-twelfth of an inch away fromthe door stop, thereby allowing the door to swing clear and not bindwhen closed. The blade 13 is provided with a finger nail catch at '24and its end 25 is cut off on a bevel to produce a sharp point to enableit to be used as shown in Fig. :2 for marking the depth of the cut onthe door jamb or on the door. The slot 2 is provided for the purpose ofholding the gage 26, said gage being tightened in a given po sition bymeans of the thumb screw 27.

The ordinary uses of the square will be obvious to those skilled inthe'art, but for the purpose of hanging doors the gage 18 is set so thedistance from the point 19 to the outer edge of the plate 10 is thedistance away from the door stop to the inner edge of the mortise seatfor the door butt, while the distance from the point 20 to the flange 12will represent a cut on the door which will leave slightly less than theamount left on the door jamb, thereby setting the door out from the ambslightly when the hinges are together. The sharp point 25 is then set sothat it will make a mark both on the door jamb and on the door the depthof the hinge mortise. When once set in this position all of thenecessary marks for hanging the door maybe made one after the otherWithout changing the square or gages thereon.

In order to enable the carpenter to true up doors or other lumber whenplaning the same a reentrant square corner 28 is produced in the plate1.

Since the square is used mostly in the left hand the figures are made onone side the reverse of the other, so they can be read by turnin thesquare over Without changing its position in the hand.

Having thus described my invention What I claim as new and desire tosecure by Letters Patent of the United States, is as follows, expressreservation being made of permissible modifications:

1. A carpenters square comprising a fiat plate, a double gage thereon,one point of which projects in a plane parallel to the plane of theplate and the other point of which projects at right angles to the planeof the plate, and means to secure said gage plate in diiierentadjustments with respect to the first plate.

2. A carpenters square comprising a fiat slotted plate, an adjustabledouble point gage slidable thereon parallel to one of the edges of theplate, and a flanged plate secured to the first plate and adapted toform the base for making marks in conjunction with one of the points ofthe double gage.

3. A carpenters square comprising a fiat plate having a rentrant squareformed therein, and having a slot in said fiat plate 1 WILLIAM A.PAWVSON.

Copies of this patent'may be obtained for five cents each, by addressingthe Commissioner of'latents,

Washington, D. 0.

